Re: [boost] BOOST_STATIC_CONSTANT

Subject: Re: [boost] BOOST_STATIC_CONSTANT
From: Vladimir Batov (Vladimir.Batov_at_[hidden])
Date: 2017-08-17 02:35:04

On 2017-08-17 12:14, Glen Fernandes via Boost wrote:
> On Wed, Aug 16, 2017 at 9:45 PM, Gavin Lambert via Boost wrote:
>> On 17/08/2017 13:27, Glen Fernandes wrote:
>>> 
>>> This is to detect a member 'impl_ptr_type' type? Just:
>>> 
>>>      template<class, class = void>
>>>      struct has_impl_ptr_type
>>>          : boost::false_type { };
>>>      template<class T>
>>>      struct has_impl_ptr_type<T, boost::void_t<typename 
>>> T::impl_ptr_type>
>>>          : boost::true_type { };
>> 
>> That *is* a nicer way to do it.  Requires a minimum of Boost 1.64 or 
>> C++17,
>> though.  (Or VS2015, apparently.)
> 
> *Nod* - since Vladimir's intent is proposing this library for Boost, I
> just assume that his library can assume Boost v.Latest. :)

Thank again, Glen. I've incorporated your version. As a separate struct 
(as you and Gavin showed) all works now. Many thanks.